Characterization Marches On

When a series starts out, the characters usually don't have firmly established personalities since the writers are just getting a feel for them. Time goes on, more and more episodes are produced, and the characters become better defined with their own set of personality and behavioral quirks. Or maybe their early personality gradually gave way to something very different due to Character Development and/or Flanderization. Whatever the case may be, though, their early incarnations are forgotten about as people look at the firmly established characterization.